Why do thermos bottle keep cold beverages contained inside them from getting warm?

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Explain why the plants cortex would serve as the best food source for animals

The pressurized plants and fungi mentioned in the video have some surprising similarities. what differences would you expect them to have?